4221073 has 4 divisors (see below), whose sum is σ = 4324068. Its totient is φ = 4118080.

The previous prime is 4221047. The next prime is 4221109. The reversal of 4221073 is 3701224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 861184 + 3359889 = 928^2 + 1833^2 .

It is a cyclic number.

It is not a de Polignac number, because 4221073 - 2¹³ = 4212881 is a prime.

It is a Duffinian number.

4221073 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4221073.

It is not an unprimeable number, because it can be changed into a prime (4221473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51436 + ... + 51517.

It is an arithmetic number, because the mean of its divisors is an integer number (1081017).

Almost surely, 2^4221073 is an apocalyptic number.

It is an amenable number.

4221073 is a deficient number, since it is larger than the sum of its proper divisors (102995).

4221073 is a wasteful number, since it uses less digits than its factorization.

4221073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102994.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 4221073 is about 2054.5250059320. The cubic root of 4221073 is about 161.6122540989.

Adding to 4221073 its reverse (3701224), we get a palindrome (7922297).

It can be divided in two parts, 42 and 21073, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 4221073 in words is "four million, two hundred twenty-one thousand, seventy-three".